1. From the Toronto General Hospital, Toronto, Ontario, Canada (N.J., S.G., K.V., B.K., S.M., M.K., A.P.-S., J.R.J., F.K., M.D., A.C.T.H., E.D., K.N.); Laboratory IMB, University of Bordeaux, Talence, France (A.P., E.V.); and LIRYC Cardiac Electrophysiology and Heart Modelling Institute, University of Bordeaux Foundation, Pessac, France (A.P., E.V.).